I have a cordless drill with two 18v lion batteries (brand doesn't matter). Both batteries last about 1/4 as long as they used to when new. I have tried to get them replaced under warranty, but when they test them, they say they are taking and holding a charge. Trouble is, they don't last very long when using them. I know, because I finally bought a new one and it lasts way, way longer than either of the older ones. The said as long as it takes a charge, they can't replace them. I can only drill about 20 2" deck screws before they give up.
OK, so how can I "KILL" the damn things so that I can get them replaced. I have tried taping the drill power button down until it ran the battery to nothing and then left it that way for about 12 more hours. It will charge back up, but still won't last very long at all. I just don't want to have to swap out batteries every 5 minutes when working on a project or have to recharge them before every use because the will eventually run down after a week or so of non-use.
How can I "kill" them with out it being evident that I "killed" them on purpose.
Thanks.